Windshield wiper arm



Dec. 24, 1940. E. w. SIBLEY 2,226,358

' WINDSHIELD WIY'PER ARM Filed Feb. 25, 1959 V 4. f/ d. 3.

I v I fomgao 5222f ATTORNEYS Patented Dec. 24, 1940 PATENT OFFICE WINDSHIELD WIPER ARM Edward W. Sibley, Kenmore, N. Y., assignor to Trico Products Corporation, Buffalo, N. Y.

Application February 25, 1939, Serial No. 258,522

3 Claims.

This invention relates to a windshield cleaner and more particularly to the wiper arm construction and mounting thereof.

Wiper arms have heretofore been made of leaf 5 spring construction in which the blade carrying portion thereof was articulated to the shaft carried part by a pivot, thereby requiring a special operation of assembly in connection with the swaging or riveting of the ends of the pivot pin.

10 The present invention has for its primary object to simplify the arm construction so that the parts thereof may be united in a more expeditious manner. The invention also aims to provide a construction in which the arm while per- 15 forming eniciently may also be swung outwardly to an inoperative position where it is supported by reason of the novel relation of parts.

In the drawing Fig. 1 is a fragmentary view in side elevation showing the improved arm in its operative position on a windshield;

Fig. 2 is an enlarged fragmentary view partly in section, more clearly depicting the structural features of the arm; 25 Fig. 3 is a rear elevation of the arm in fragment, as viewed in Fig. 2; and

Fig. 4 is a front elevation of the shaft carried part of the arm.

Referring more particularly to the drawing, 30 the numeral 1 designates the windshield or window surface of a motor vehicle on "which the wiper 2 is oscillated from the actuating shaft 3 through the connecting arm; The arm construction embodies a casting 4 having an opening 35 therethrough to receive the shaft 3 to which it is secured by a clamping nut 5. The casting is formed with a radial arm part 6 which is channeled. as shown at I, and across the channel extends a pivot forming bridge or bearing 8 which is spaced from the shaft receiving portion to form a slot 9, the defining walls thereof being flared to facilitate the entrance of the companion part of the arm. This companion part is formed with an angular terminal hook III which is engaged through the slot 9 with the bridge 8, the latter being provided with a fulcrum II on which the elbow I2 pivots. The elbow is held down on the curved fulcrum surface H by a leaf spring 13 which engages the opposite side of the 50 bridge 8, the spring being carried by the blade carrying portion M of the arm to which it is secured as by a rivet IS. The bridge is preferably elongated from the elbow toward the spring so as to provide a lower edge l6 against which the 55 terminal ill will engage to restrict outward swinging of the arm from the windshield, and when in such outward position the leaf spring I3 is designed to engage the opposite side of the lower edge [6 and thereby exert a pressure tending to hold the arm in its outer position as indicated by 5 the broken lines in Fig. 2.

To assemble the component parts of the arm it is only necessary to displace the spring [3 from the hook ID to provide sufficient clearance to pass over the bridge 8 and thereafter the spring is released to bear against the lower edge It so as to hold the elbow I2 for pivoting movement about the axis of the curved edge II.

From the foregoing it will be observed that the outer section of the arm comprising the parts I3 and I4 may readily be connected and disconnected from the shaft carried part or casting 4, and that the construction of the outer arm is likewise simplified so as to require a minimum number of parts and operations,

While the foregoing disclosure has been made in detail it is obvious that it is merely illustrative of the inventive principles involved, which 'may be applied to other physical embodiments without departing from the scope and spirit of the invention claimed.

I claim:

1. A wiper arm for windshield cleaners comprising a shaft carried section formed of a single casting and provided with a transverse bridge defining an opening, an outer section bent at one end to form a bight portion and an angular part, the latter extending through the opening, the inner side of the bight portion engaging the bridge for pivoting action, the free end of the 5 angular part being normally spaced from the bridge but engageable therewith to limit the extent of pivoting action, and a leaf spring carried by the outer section to resiliently hold the bight portion engaged with the bridge.

2. A windshield wiper carrying arm comprising a shaft carried part formed with spaced projecting walls connected by a bridge to provide a transverse bearing, an outer arm section bent at one end to form a bight portion and a projecting angular part, with the angular part extending through the opening and the bight portion pivoting on the bridge for movement toward and from an associated windshield, the angular part being engageable with the bridge to limit the pivoting movement of the arm section, and a leaf spring carried by the outer section with its free end extending in proximity. to the angular part and engaging the opposite side of said bridge to hold the bight portion operatively related there- 5 to, said arm section pivoting between the spaced walls.

3. A windshield wiper arm comprising a shaft carried section formed with a. transverse bridge part of elongated cross section providing a bearing along one edge portion and extending divergently from the shaft axis toward the opposite edge portion, a companion section having an angular part providing a bight portion detachably engaging the bearing edge portion for pivotal action, and a leaf spring carried by said companion section and exerting pressure on said opposite edge portion in opposition to said companion section for seeming the sections together, such opposite edge portion being defined by inner and outer side walls and so disposed as to be normally engaged on the inner side wall by the spring to hold the wiper arm operative and to be engaged on the outer side wall by the spring to hold the wiper arm in an outwardly swung position with respect to an associated windshield, the free end of the angular part being normally spaced from the bridge part but engageable 10 therewith to determine such outwardly swung position.

EDWARD W. SIBLEY. 

